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US 11,456,453 B2Granted
Cathode active material, method of preparing the same, and lithium secondary battery including cathode including the same
AssigneeSm Lab Co., Ltd.
InventorsMin Ho Seo, Ji Young Kim
Life of this patent
Estimating the term…
Abstract
Provided is a cathode active material including a core including a compound represented by Formula 1; and a coating layer including a phosphorus-containing compound disposed on a surface of the core: LiaZrαWβM1−α−βO2−bSb Formula 1 In Formula 1, M, Zr, W, a, α, β, and b are the same as defined in relation to the present specification.
Claims20
A cathode active material comprising:
- a core comprising a compound represented by Formula 1;
- and
- a coating layer comprising a phosphorus-containing compound disposed on the surface of the core:
- is LiaZrαWβM1−α−βO2−bSb;
- Formula 1
- wherein, in Formula 1,
- M is at least one transition metal selected from transition metals, except Zr and W;
- and
- 0.98≤a≤1.02, 0<α≤0.005, 0<β≤0.005, and 0<b≤0.1.
6 more elements
A method of preparing a cathode active material, the method comprising:
- mixing a lithium precursor, a Zr precursor, a W precursor, a M precursor, a S precursor, and a phosphorus-containing compound precursor to obtain a precursor mixture;
- and
- heat-treating the precursor mixture to obtain a cathode active material represented by Formula 1;
- is LiaZrαWβM1−α−βO2−bSb, Formula 1
- wherein, in Formula 1, M is at least one transition metal selected from transition metal except Zr and W;
- and
- 0.98≤a≤1.02, 0<α≤0.005, 0<β≤0.005, and 0<b≤0.1.
4 more elements
Dependencies are inferred from the claim text.